WPI Students' 2007 POPSCI Invention Award Photo Gallery

The mouse's small ultrasonic transmitter.

The transmitter can be worn on the finger like a ring...

or even around the finger, but facing out from the palm.

In the prototype, five receivers are arrayed in a metal device placed next to the monitor.

This is an early version of the receiver array, which was made from wood.

The basic functions of the transmitter and receivers. TDOA stands for time delay of arrival.

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